ORCID Profile
0000-0002-4600-7852
Current Organisation
Macquarie University
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Publisher: SPIE
Date: 29-08-2022
DOI: 10.1117/12.2639961
Publisher: Oxford University Press (OUP)
Date: 02-2012
Publisher: SPIE
Date: 13-09-2012
DOI: 10.1117/12.924874
Publisher: Oxford University Press (OUP)
Date: 10-2001
Publisher: OSA
Date: 2010
Publisher: American Astronomical Society
Date: 16-01-2013
Publisher: IEEE
Date: 08-2011
Publisher: IEEE
Date: 05-2011
Publisher: SPIE
Date: 12-07-2008
DOI: 10.1117/12.788527
Publisher: IEEE
Date: 05-2011
Publisher: Oxford University Press (OUP)
Date: 08-2003
Publisher: Oxford University Press (OUP)
Date: 03-2001
Publisher: SPIE
Date: 06-07-2018
DOI: 10.1117/12.2312939
Publisher: Oxford University Press (OUP)
Date: 17-08-2012
Publisher: SPIE
Date: 13-12-2020
DOI: 10.1117/12.2561930
Publisher: Optica Publishing Group
Date: 10-2009
DOI: 10.1364/OE.17.018643
Publisher: SPIE
Date: 06-01-2020
DOI: 10.1117/12.2539883
Publisher: IEEE
Date: 08-2011
Publisher: Springer Science and Business Media LLC
Date: 06-12-2011
DOI: 10.1038/NCOMMS1584
Abstract: A long-standing and profound problem in astronomy is the difficulty in obtaining deep near-infrared observations due to the extreme brightness and variability of the night sky at these wavelengths. A solution to this problem is crucial if we are to obtain the deepest possible observations of the early Universe, as redshifted starlight from distant galaxies appears at these wavelengths. The atmospheric emission between 1,000 and 1,800 nm arises almost entirely from a forest of extremely bright, very narrow hydroxyl emission lines that varies on timescales of minutes. The astronomical community has long envisaged the prospect of selectively removing these lines, while retaining high throughput between them. Here we demonstrate such a filter for the first time, presenting results from the first on-sky tests. Its use on current 8 m telescopes and future 30 m telescopes will open up many new research avenues in the years to come.
Publisher: SPIE
Date: 03-01-2020
DOI: 10.1117/12.2541306
Publisher: SPIE
Date: 27-08-2022
DOI: 10.1117/12.2631696
Publisher: SPIE
Date: 28-07-2014
DOI: 10.1117/12.2055597
Publisher: SPIE
Date: 06-07-2018
DOI: 10.1117/12.2311898
Publisher: SPIE
Date: 30-09-2004
DOI: 10.1117/12.551591
Publisher: SPIE
Date: 14-06-2006
DOI: 10.1117/12.670943
Publisher: Springer Netherlands
Date: 2009
Publisher: Springer Netherlands
Date: 2009
Publisher: Springer Netherlands
Date: 2009
Publisher: SPIE
Date: 24-09-2012
DOI: 10.1117/12.925260
Publisher: Cambridge University Press (CUP)
Date: 11-2010
DOI: 10.1017/S1743921310010604
Abstract: Working in collaboration with industry, the University of Sydney, the Anglo-Australian Observatory and Macquarie University are developing new ‘astrophotonic’ solutions to problems in astronomical instrumentation. A key first step involves overcoming the limitations imposed by multimode (MM) optical fibres that have been used by astronomers for many years to transport or reformat light from the telescope focus to an optical spectrograph. These large-core MM fibres maximise light into an astronomical instrument but at the expense of propagating many unpolarized modes. Until recently, this has deterred the use of more complex in-fibre processing of the light since this is typically limited to single-mode (SM) propagation. A MM to SM converter, known as a ‘photonic lantern’, was first demonstrated by Leon-Saval et al . (2005). If the number of transverse modes equals the number of SM fibres, and if a gradual and adiabatic transition between the MM fiber and the ensemble of SM fibres can be achieved, lossless coupling can take place in either propagation direction. Noordegraaf et al . (2009) demonstrated an efficient 1 x 7 photonic lantern (1 MM input and 7 SM outputs) for the first time.
Publisher: SPIE
Date: 30-09-2004
DOI: 10.1117/12.552012
Publisher: SPIE
Date: 03-01-2020
DOI: 10.1117/12.2539579
Publisher: Cambridge University Press (CUP)
Date: 2015
DOI: 10.1017/PASA.2015.49
Abstract: The first observations by a worldwide network of advanced interferometric gravitational wave detectors offer a unique opportunity for the astronomical community. At design sensitivity, these facilities will be able to detect coalescing binary neutron stars to distances approaching 400 Mpc, and neutron star–black hole systems to 1 Gpc. Both of these sources are associated with gamma-ray bursts which are known to emit across the entire electromagnetic spectrum. Gravitational wave detections provide the opportunity for ‘multi-messenger’ observations, combining gravitational wave with electromagnetic, cosmic ray, or neutrino observations. This review provides an overview of how Australian astronomical facilities and collaborations with the gravitational wave community can contribute to this new era of discovery, via contemporaneous follow-up observations from the radio to the optical and high energy. We discuss some of the frontier discoveries that will be made possible when this new window to the Universe is opened.
Publisher: SPIE
Date: 13-09-2012
DOI: 10.1117/12.925100
Publisher: American Institute of Aeronautics and Astronautics
Date: 03-09-2015
DOI: 10.2514/6.2015-4337
Publisher: SPIE
Date: 08-07-2014
DOI: 10.1117/12.2055588
Publisher: SPIE
Date: 12-07-2008
DOI: 10.1117/12.788629
Publisher: American Astronomical Society
Date: 05-12-2012
Publisher: SPIE
Date: 14-07-2008
DOI: 10.1117/12.788624
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6NR00740F
Abstract: An overview of the mechanism, synthesis and modification of nano zerovalent iron in water treatment is provided.
Publisher: SPIE
Date: 12-07-2008
DOI: 10.1117/12.788549
Publisher: SPIE
Date: 14-06-2006
DOI: 10.1117/12.670931
Publisher: SPIE
Date: 09-08-2016
DOI: 10.1117/12.2232115
Publisher: SPIE
Date: 12-07-2008
DOI: 10.1117/12.788650
Publisher: SPIE
Date: 24-09-2012
DOI: 10.1117/12.926483
Publisher: SPIE
Date: 16-07-2010
DOI: 10.1117/12.856348
Publisher: Optica Publishing Group
Date: 19-02-2007
DOI: 10.1364/OE.15.001443
Abstract: Multimode fibres are widely used in astronomy because of the ease of coupling light into them at a telescope focus. The photonics industry has given rise to a broad range of products but these are almost exclusively restricted to single-mode fibres, although some can be adapted for use in fibres that allow several modes to propagate. Now that astronomical telescopes are moving toward diffraction-limited performance through the use of adaptive optics (AO), we address the problem of coupling light into a few-mode fibre (FMF). We find that fibres with as few as ~5 guided modes share important characterisitcs with multimode fibres, in particular high coupling efficiency.We anticipate that future astronomical instruments at an AO-corrected focus will be able to exploit a broad class of photonic devices.
Publisher: SPIE
Date: 28-07-2014
DOI: 10.1117/12.2054570
Publisher: SPIE
Date: 24-09-2012
DOI: 10.1117/12.924945
Publisher: Oxford University Press (OUP)
Date: 08-01-2020
Abstract: Ground-based near-infrared (NIR) astronomy is severely h ered by the forest of atmospheric emission lines resulting from the rovibrational decay of OH molecules in the upper atmosphere. The extreme brightness of these lines, as well as their spatial and temporal variability, makes accurate sky subtraction difficult. Selectively filtering these lines with OH suppression instruments has been a long standing goal for NIR spectroscopy. We have shown previously the efficacy of fibre Bragg gratings (FBGs) combined with photonic lanterns for achieving OH suppression. Here we report on PRAXIS, a unique NIR spectrograph that is optimized for OH suppression with FBGs. We show for the first time that OH suppression (of any kind) is possible with high overall throughput (18 per cent end-to-end), and provide ex les of the relative benefits of OH suppression.
Publisher: SPIE
Date: 16-07-2010
DOI: 10.1117/12.856103
Publisher: Wiley
Date: 04-12-2019
DOI: 10.1002/AIC.16466
Publisher: Oxford University Press (OUP)
Date: 16-05-2013
DOI: 10.1093/MNRAS/STT677
Publisher: SPIE
Date: 29-07-2016
DOI: 10.1117/12.2232467
No related grants have been discovered for Anthony Horton.